# get_idle_minutes.ps1
Add-Type @"
using System;
using System.Runtime.InteropServices;

public class User32 {
    [StructLayout(LayoutKind.Sequential)]
    public struct LASTINPUTINFO {
        public uint cbSize;
        public uint dwTime;
    }

    [DllImport("user32.dll")]
    public static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);
}
"@

$lii = New-Object User32+LASTINPUTINFO
$lii.cbSize = [System.Runtime.InteropServices.Marshal]::SizeOf($lii)
[User32]::GetLastInputInfo([ref]$lii)

$tickCount = [Environment]::TickCount
$idleTicks = $tickCount - $lii.dwTime
if ($idleTicks -lt 0) { $idleTicks += 0x100000000 }

$idleMinutes = [Math]::Floor($idleTicks / 1000 / 60)
Write-Output $idleMinutes